DE9420028U1 - Drum lifter for products to be processed - Google Patents

Description

Barrel lifter for products to be processed

The present invention relates to devices for lifting barrels and in particular to devices for lifting barrels or containers for the purpose of heating viscous products directly inside their processing container and pumping them out of it.

Devices are known in which a barrel or a container, in which there is a viscous product to be processed, is arranged between two pneumatic cylinders, which in turn carry a pump arrangement. This pump arrangement consists of a heating plate, which is lowered and introduced into the barrel or container and which comes into contact with the product, at the same time ensuring the tightness between the container and the plate. The pump for the product, which is fixedly arranged on the upper surface of the plate, can be either a piston or a gear pump. In the first case, the pump is operated by a pneumatic or hydraulic cylinder. In the second case, the gears are driven by an electric motor or by a hydraulic motor. The

Deutsche Bank, Herne [bank code 430 700 61] Account number*£*145 51Qi- Bank of Munich (bank code 700 202 705 Account number 40 505 9<?9

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The entire assembly, consisting of plate, pump and motor, is moved vertically by the two hydraulic cylinders, whereby in order to maintain the pumping function, the position of the arrangement always corresponds to the fill level of the product inside the barrel or container. The liquefied product is pumped out of the container and, starting from the pump, is guided through a flexible, heated guide device to another machine or to an extruder. If the heating plate is to be removed from the barrel or container, it is necessary to guide compressed air between the plate and the product contained in the container in order to avoid a suction effect. ' ~ . · - ■

This known barrel lifting device for processing products to be treated has various disadvantages. The known device described has unprotected moving parts that pose a risk of injury. Another disadvantage is that a flexible line is required to drain the treated product from the pump, as this can cause any residual pressure to be lost due to the flexible line expanding. The introduction of compressed air to extract the heating plate from the container with the product to be treated poses a safety problem, as it can never be completely ensured that there is not still a cushion of compressed air between the plate and the product when the heating plate leaves the container, which would suddenly escape when the heating plate is removed. Another disadvantage is that the use of two pneumatic cylinders that support a platform can cause the heating plate to jam inside the container or barrel, blocking the entire device. If, for any reason, the compressed air supply is interrupted when extracting the heating plate from the container containing the product to be treated, the heating plate may also sink into the container in an uncontrolled and therefore dangerous manner.

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The object of the present invention is therefore to provide a device which eliminates the described disadvantages of the known prior art, but which at the same time allows efficient treatment of the product to be processed in "one" container.

This object is achieved by the characterizing features of claim 1, whereby expedient embodiments of the invention are characterized by the subclaims.

"According to the present invention, a device is provided which is based on a principle that is contrary to the prior art. A chassis is provided which is made up of standing elements, upper, preferably horizontal, holding elements and vertical support elements which are arranged on the standing elements and which carry the holding elements. Guide rails are arranged on the vertical support elements of the chassis. Brackets engage in these guide rails and can be moved linearly along the guide rails, which in turn carry a lifting table. The arrangement, consisting of the brackets running in guide rails and the lifting table, is moved up and down by a movement cylinder, preferably a hydraulic cylinder, which is attached to the chassis on the one hand and to the lifting table on the other, whereby the movement cylinder is preferably arranged between the chassis and the lifting table so that the moving parts are not normally accessible for operation.

An arrangement consisting of a pump and a heating plate device is attached to the upper support element of the chassis and is firmly mounted on the chassis. The orientation of the pump and the heating plate corresponds to the orientation of the lifting table, so that in the event that a container or a barrel with a product to be treated is arranged accordingly on the lifting table,

When the lifting table is moved, the hydraulic cylinder moves the heating plate into the container or barrel so that the product can be processed and pumped out.

The barrel lifting device according to the invention is also provided with a "rigid" line which guides the processed and pumped product from the pump arrangement to another machine or to an extruder.

This type of barrel lifting device advantageously ensures complete coverage of the moving parts, since the movement cylinder is not arranged in an accessible manner, so that there are no unprotected and therefore dangerous moving parts.

With the barrel lifting device according to the invention, it is surprisingly easy to provide a second barrel lifting device on the same chassis in a symmetrical arrangement to the first barrel lifting device. Furthermore, by using a hydraulic cylinder to raise and lower the device, it is possible to extract the heating plate from the container or barrel with the product to be treated without passing compressed air between the heating plate and the product. This advantageously prevents a residual cushion of compressed air between the heating plate and the product from causing a sudden escape of compressed air when the heating plate leaves the container.

Since only a single movement cylinder is provided for raising and lowering the lifting table instead of two cylinders, as in the prior art, the effort required to operate the device in terms of the cable and switching arrangement is also reduced. Since the lifting table runs on retaining elements in guide rails on the vertical support elements, tilting and thus getting stuck of the lifting device is also advantageously avoided. Finally, uncontrolled lowering and

Immersion of the heating plate in the product to be treated by interrupting the compressed air supply, as in the prior art, can be ruled out, since in the worst case the lifting table can sink with the container, which only leads to an extraction of the heating plate arrangement from the container.

By providing a rigid discharge line from the pump arrangement to another machine or to an extruder, the disadvantages of the prior art with regard to a flexible discharge line are advantageously avoided, which consist in the fact that any residual pressure that may be present is lost due to the dilatation of the flexible discharge line.

In contrast to the prior art, the barrel lifting device according to the invention represents a significant improvement in terms of safety as well as efficiency in barrel lifting devices with heating/pump arrangements.

In the following, a preferred embodiment of the barrel lifting device according to the invention is described with reference to the only existing drawing, in which:

Fig. 1 is a schematic side view of an embodiment of the barrel lifting device according to the invention.

Figure 1 shows a preferred embodiment of the barrel lifting device according to the invention, which shows a chassis 1 with a stand element la, a horizontal upper holding element 1b and a vertical support element lc, which is arranged on the stand element la and which carries the upper horizontal holding element 1b. A guide rail 2 is arranged on the vertical support element lc, into which horizontal holding elements 4a engage in a vertically linearly displaceable manner. These horizontal holding elements carry a lifting table 4. Between the guide rail 2 and the lifting table 4

a movement cylinder, preferably a hydraulic cylinder 3, is arranged, which is connected to the chassis at point 3a and to the lifting table at point 3b. The arrangement consisting of the holding elements 4a and the lifting table 4 can be moved in the vertical direction by means of this cylinder 3. A pump arrangement 7 is firmly attached to the upper horizontal holding element 1b of the chassis, which carries a heating plate 6 via a suitable fastening device. During operation, a container or barrel 5 containing the product to be processed is arranged on the lifting table 4. This barrel or container is preferably aligned by positioning aids arranged on the lifting table so that it corresponds to the arrangement of the heating plate. If the arrangement of holding elements 4a and lifting table 4 is in a raised position, the heating plate 6 is immersed in the container 5 and is in contact with the viscous product to be liquefied and pumped out. If the arrangement of the holding elements 4a and the lifting table 4 is in the lowered position (not shown), the heating plate is outside the container 5.

Claims (1)

- 7 PROTECTION CLAIMS 1. Barrel lifting device for products to be treated, for lifting containers containing a product to be treated, with a treatment device, consisting of _ . consisting of a pump arrangement, a heating plate which is connected to the pump arrangement, and a line for discharging the processed product from the pump, characterized in that the arrangement, consisting of the pump (7) and the heating plate (6) is firmly and immovably connected to a chassis (1); that a lifting device is provided, the orientation of which corresponds to the arrangement of the heating plate, and which can be moved linearly up and down in the vertical direction, so that the heating plate is located in a container positioned on the lifting device when the latter is in an upwardly moved position and that the heating plate is located outside the same container when the lifting device is in a lowered position. 2. Barrel lifting device according to claim 1, characterized in that the chassis (1) consists of a stand element (la), an upper horizontal holding element (Ib) and a vertical support element (Ic), wherein the support element (Ic) is arranged on the stand element (la) and carries the upper horizontal holding element (Ib). 3. Barrel lifting device according to claims 1 and 2, characterized in that the lifting device consists of a lifting table (4) and at least one horizontal holding element (4a) which is firmly connected to the lifting table (4). 4. Barrel lifting device according to one of the preceding claims, characterized in that on the vertical Support element (lc) of the chassis is provided with at least one guide rail (2) into which the free ends of the holding elements (4a) of the lifting table (4) engage in a vertically linearly movable manner. "5. Barrel lifting device according to one of the preceding claims, characterized in that a movement cylinder (3), preferably a hydraulic cylinder, is provided, which is movably connected on the one hand to the chassis (3a), and on the other hand also to the lifting device (3b), wherein the movement cylinder preferably- ~ "way between the vertical support element"~(Ic) of the chassis and the lifting table (4) of the lifting device. 6. Barrel lifting device according to one of the preceding claims, characterized in that a rigid pipe is provided on the pump device (7) for discharging the processed product to another machine or to an extruder. 7. Barrel lifting device according to one of the preceding claims, characterized in that a chassis with a symmetrical arrangement of pump, heating plate, guide rail and lifting device is provided, wherein the lifting devices can only be moved up and down by a movement cylinder.